Stop mechanism for machinery.



Patented Dec. I7, I9IDI.

J. scan. s'roP MECHANISM F08 MACHINERY.

(Application flied Sept. 21, 1900.

2 Sheets-Sheet l.

(Nu Model.)

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No. 688,889. Patented Dec. l7, [90L J. R. SCOTT.

STOP MECHANISM FOR MACHINERY.

(Application filed 591515.91, 1900.

2 Sheets-Sheat 2.

(No Model.)

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JACOB R. SCOTT, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO UNITED SHOEMACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

STOP ECHANISM FOR MACHINERY.

SPECIFICATION formingpart of Letters Patent No. 688,889, dated December17, 1901. Application filed September 21, 1900. Serial No. 30,678. (Nomodel.)

T at whom it may concern.-

Be it known that 1, Moon R. Soorr, a citizen of the United States,residing at Boston,

in the county of Suffolk and State of Massachusetts, have inventedcertain new and useful Improvements in Stop Mechanism for Machinery; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to stop mechanism for machinery.

The object of my present invention is to provide an improved mechanismof the class referred to whereby the operating parts of a machine may begiven a series of movements and then stopped in a certain definiteposition.

With this object in view my invention consists in the improved mechanismhereinafter described and claimed.

My invention can be applied to any machine in which it is desirable todisconnect the operating parts from the driving-shaft z 5 after apredetermined number of revolutions,

but is particularly intended for application to the leather-skivingmachine disclosed in my pending application, Serial No. 737,224,

filed November 16, 1899.

A preferred form of my invention is illustrated in the accompanyingdrawings, in which Figure 1 is a view in side elevation of a mechanismembodying the invention. Fig. 3 5 2 is a similar view of the oppositeside to that shown in Fig. 1. Fig. 3 is a sectional view on the line 33, Fig. l; and Fig. 4 is a detail sectional view of the clutch members.

Referring to the drawings, in which like 0 characters of referenceindicate like parts, 1

represents a portion of the frame of a leatherskiving or other machine.In the top portion of the frame and extending horizontally therefrom issecured, by means of the screw 2, a

5 fixed shaft or stud 3, having loosely mounted thereon the drivingpulley 4 and pinion 5. Meshing with the pinion 5 is a gear 6, secured toa shaft 7, on which is also secured a gear .8, meshing with a gear 9,fast on a shaft 10,

the arrangement being such that the rotary movement of the pinion 5 istransmitted to the gears 6, 8, and 9 and to the shafts 7 and 10. Forconnecting the pinion 5 and driving-pulley 4 suitable clutchingmechanism is provided, such mechanism,as shown,comprising aprojectinglug 11 on thehub of the driving-pulley and a projecting lug 12on a collar 13, splined on the extended hub of the pinion 5 and arrangedto slide thereon to bring the projecting lug 12 into the path of the lug11.

14 designates a clutch-actuating member, herein shown as a slide mountedto reciprocate on a rod 15, secured to the frame of the machine, saidslide being provided with arms 16, forming a yoke extending partiallyaround the collar 13 and being provided with frictionrollers 17,engaging a groove in the collar. For reciprocating the slide abell-crank lever 18 is provided, pivoted on the frame of the machine andhaving its upper arm connected to the slide 14 by means of a pivotalconnection with a block 19, mounted to reciprocate vertically insuitable guideways formed in the slide. The lower arm of the bell-crankis connected to a treadle 20 by means of a connecting-rod 21. Theabove-described arrangement is such that a depression of the treadle 20will actuate the slide 14 through the connecting-rod 21 and bell-crank18 to bring the clutch members into engagement. As a convenient meansfor actuating the slide 14 in the opposite direction to disengage theclutch members the rod 21 is provided with a weight 22. For controllingthe movements of clutchactuating slide 14 a pin 23 is provided, arrangedto bear against the face of the gear 9 and at a certain point in therevolution of the gear to enter a recess or seat formed therein, saidpin being adjustably secured in the upper end of an arm 24 of the slide14 by means of a screw 25.

As shown in Fig. 2, the edge of the recess of the gear 9 is cut away orbeveled and the end of the pin 23 is made slightly round, whereby thepin is enabled to readily enter the recess. B y this construction alsothe slide 14 is positively actuated by the engagement of the bevelededge of the recess with the rounded end of the pin to force the clutch.

through the connections hereinbefore described, to move the clutchmember into engagement and the pin 23 from the recess in the gear 9. Thepinion 5 will now revolve and through the gears 6 and 8 rotate the gear9 to move the recessin the gear 9 out of alinement with the pin 23. Thetreadle 20 is now released, and the pin 23 bears against the face of thegear 9, which prevents any backward movement of the pin 23 and slide 14,and thus acts as a locking member to hold the members of the clutch inengagement. As

I the gear 9 completes its revolution the recess in the face of the gearcomes into alinement with the pin 23, which is forced into the recess bythe action of the weight 22, thereby positively stopping the rotation ofthe gear and at the same time allowing the slide 14 to disengage theclutch members. The number of revolutions which will be made by thedriven member of the clutch at each operation of the mechanism willdepend on the relative number of teeth in the gears connecting themember with the gear 9, as will be evident. The gear 9 will always bestopped at a certain predetermined point, as the pin 23 is firmlysupported in the slide 14, which is prevented from sidewise movement bythe rod 15 and arms 16, carrying the rollers 17, engaging the groovedcollar 13. By adjusting the pin 23 in the arm 24: the relativelongitudinal position of the engaging members of the clutch when inengagement can be varied as desired.

The mechanism which I have illustrated in the drawings and abovedescribed embodies my invention in the best form at present known to me;but it is to be understood that as to itslgeneric features it is notlimited thereto, but may be embodied in many different forms withoutdeparting from the spirit thereof.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A stop mechanism, having, in combina tion, a clutchcomprising a driving member and a driven member movable toward and fromthe driving member, a locking member driven from the driven memberprovided with a recess, a slide located between the driving member andthe locking member engaging the driven member and arranged to bearagainst the locking member to hold the clutch members in engagement andmeans for forcing the slide into said recess to disengage the clutchmember's, substantially as described.

2. A stop mechanism, having, in combination, a clutch comprising drivingand driven members one of which is movable toward and from the other, arotating locking member provided with a recess driven from the drivenmember and located adjacent to the movable clutch member, a slideengaging the movable clutch member located between the other clutchmember and the locking member and arranged to bear against the lockin gmember and hold the clutch members in engagement, and means for forcingthe slide into said recess to disengage the clutch members,substantially as described.

3. A stop mechanism having, in combination, a gear provided with arecess in its face, a clutch-actuating member, a pin carried by saidmember arranged to bear against the face of the gear and enter therecess, a clutch member engaged by the clutch-actuating member, andmeans for adjusting the pin toward and from the gear, substantially asdescribed.

4:. A stop mechanism having, in combination, a clutch comprising adriving member, a driven member movable toward and from the drivingmember, a locking member driven from the driven member provided with arecess, a slide engaging the driven member arranged to bear against thelocking member and hold the clutch members in engagement and means forforcing the slide into said recess to disengage the clutch members,substantially as described.

5. A stop mechanism having, in combination, a clutch comprising drivenand driving members movable toward and from each other, a gear drivenfrom the driven member provided with a recess in its face, a slideengaging one of the clutch members arranged to bear against the face ofthe gear for holding the members of the clutch in engagement and toenter the recess to disengage the clutch members, and a lever and weightfor moving the slide back and forth, substantially as described.

63. A stop mechanism having, in combination, a clutch comprising drivenand driving members movable toward and from each other, a gear drivenfrom the driven member provided with a recess in its face, a slideengaging one of the clutch members, a pin on said slide arranged toenter the recess, a lever pivoted to the slide and an actuating weightand treadle for thelever, substantially as described.

7. A stop mechanism having, in combina-- tion, a clutch comprisingdriven and driving members movable toward and from each other, a geardriven from the driven member provided with a recess in its face, aslide en gaging one of the clutch members arranged to bear against theface of the gear for holding the members of the clutch in engagement, IJACOB SCOTF' and means for forcing the slide into said re- Witnesses:cess to disengage the clutch members, sub- ALFRED H. HILDRETH,

In testimony whereof I affix my signature in presence of two Witnesses.

stantially as described, I FRED O. FISH.

